<template>
  <div>
    <!--面包屑 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog" plain style="margin-bottom: 10px">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table :data="catelist" :columns="columns" :selection-type="false" :expand-type="false" show-index index-text="#" border>
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" v-if="scope.row.cat_deleted==false" style="color: lightgreen"></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level===0">一级</el-tag>
          <el-tag type="success" v-else-if="scope.row.cat_level===1">二级</el-tag>
          <el-tag type="warning" v-else>三级</el-tag>
        </template>
        <template slot="opt" slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.cat_id)" plain>编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeCate(scope.row.cat_id)" plain>删除</el-button>
        </template>
      </tree-table>
      <!-- 分页 -->
      <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="querInfo.pagenum" :page-sizes="[3,5,10,15]" :page-size="querInfo.pageSize" layout="total,sizes,prev,pager,next,jumper" :total="total">
      </el-pagination>
    </el-card>
    <!-- 添加对话框 -->
    <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" @close="addCateClosed" width="50%">
      <el-form :model="addCateForm" ref="addCateFormRef" label-width="100px">
        <el-form-item label="分类名称:" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类:">
          <el-cascader :options="parentCateList" :props="cascaderProps" v-model="selectedKeys" @change="parentCateChanged" clearable change-on-select>
          </el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer">
        <el-button @click="addCateDialogVisible = false">取消</el-button>
        <el-button type="primary" @click="addCate">确定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑对话框 -->
    <el-dialog title="编辑分类" :visible.sync="editCateDialogVisible" width="40%">
      <el-form :model="editCateForm" label-width="100px">
        <el-form-item label="分类名称:" prop="cat_name">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
        <el-button @click="editCateDialogVisible = false">取消</el-button>
        <el-button type="primary" @click="editCate">确定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
  export default {
    data() {
      return {
        //查询条件
        querInfo: {
          type: 3,
          pagenum: 1,
          pagesize: 10,
        },
        catelist: [],
        total: 0,
        columns: [
          {
            label: '分类名称',
            prop: 'cat_name',
          },
          {
            label: '是否有效',
            type: 'template',
            template: 'isok',
          },
          {
            label: '排序',
            type: 'template',
            template: 'order',
          },
          {
            label: '操作',
            type: 'template',
            template: 'opt',
          },
        ],
        //添加类别的数据
        addCateForm: {
          cat_name: '',
          cat_pid: 0,
          cat_level: 0,
        },
        addCateDialogVisible: false,
        cascaderProps: {
          value: 'cat_id',
          label: 'cat_name',
          children: 'children',
          expandTrigger: 'hover',
        },
        parentCateList: [],
        //父级分类的id数组
        selectedKeys: [],
        editCateDialogVisible: false,
        editCateForm: {
          cat_id: 0,
          cat_name: '',
          cat_pid: 0,
          cat_level: 0,
        },
      }
    },
    created() {
      this.getCateList()
    },
    methods: {
      //
      async getCateList() {
        const { data: res } = await this.$http.get('categories', {
          params: this.querInfo,
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品分类失败')
        }
        this.catelist = res.data.result
        this.total = res.data.total
        // console.log(res.data)
      },
      // 监听pahesize的改变
      handleSizeChange(newSize) {
        this.querInfo.pagesize = newSize
        this.getCateList()
      },
      // 监听 pagenum改变
      handleCurrentChange(newPage) {
        this.querInfo.pagenum = newPage
        this.getCateList()
      },
      //添加分类对话框
      showAddCateDialog() {
        this.getParentList()
        this.addCateDialogVisible = true
      },
      //获取父级分类的
      async getParentList() {
        const { data: res } = await this.$http.get('categories', {
          params: { type: 2 },
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取父级分类数据失败!')
        }
        this.parentCateList = res.data
      },
      parentCateChanged() {
        console.log(this.selectedKeys)
        if (this.selectedKeys.length > 0) {
          this.addCateForm.cat_pid = this.selectedKeys[
            this.selectedKeys.length - 1
          ]
          this.addCateForm.cat_level = this.selectedKeys.length
          return
        } else {
          this.addCateForm.cat_pid = 0
          this.addCateForm.cat_level = 0
        }
      },
      //点击按钮添加新的分类
      async addCate() {
        console.log(this.addCateForm.cat_pid)
        const { data: res } = await this.$http.post(
          'categories',
          this.addCateForm
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败!')
        }
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCateDialogVisible = false
      },
      //添加分类对话框的关闭动作
      addCateClosed() {
        this.$refs.addCateFormRef.resetFields()
        this.selectedKeys = []
        this.addCateForm.cat_level = 0
        this.addCateForm.cat_pid = 0
      },
      //通过id查找分类数据
      async showEditDialog(id) {
        const { data: res } = await this.$http.get('categories/' + id)
        if (res.meta.status !== 200) {
          this.$message.error('查询分类数据失败')
        }
        this.editCateForm = res.data
        this.editCateDialogVisible = true
      },
      //修改分类名称
      async editCate() {
        const { data: res } = await this.$http.put(
          'categories/' + this.editCateForm.cat_id,
          { cat_name: this.editCateForm.cat_name }
        )
        if (res.meta.status !== 200)
          return this.$message.error('分类名称修改失败!')
        this.getCateList()
        this.$message.success('分类名称修改成功!')
        this.editCateDialogVisible = false
      },
      async removeCate(id) {
        const confirmResult = await this.$confirm(
          '此操作将永久删除，是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning',
          }
        ).catch((err) => {
          return err
        })
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const { data: res } = await this.$http.delete('categories/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('删除分类失败！')
        }
        this.$message.success('删除分类成功！')
        this.getCateList()
      },
    },
  }
</script>
<style lang="less" scoped>
  .el-cascader {
    width: 100%;
  }
</style>